MARCH, 1900. PLANTVE UTOWAN^E MILLSPAUGH. 87 



Island (614) and Guanica, Porto Rico (763), just appearing in bloom 

 and leaf. 



IPOMCEA TRILOBA Linn. Sp. PI. 161. 



Fields, creeping over low herbage center of the island of Grand 

 Cayman (1385). Branches glabrous, leaves 4-5 cm , leaflets mucro- 

 nulate, seeds glabrous, polished. 



IPOMCEA TUBA (Schl.) G. Don. Syst. 4:271. 



Convolvulus T. Schl. Ip. grandiflora Lam. non Jacq. South 

 shore of Cayman Brae (1234), climbing over low bushes. In our 

 specimens the leaves are often three lobed at the middle or tending 

 to this form near the auricles, basal sinus deep and narrow (in Bona- 

 nox it is shallow and broad). 



IPOMCEA VENTRICOSA (Bert.) G. Don. Syst. 4:274. 



Convolvulus v. Bart. Climbing over hedges near Port Antonio, 

 Jamaica (980), probably planted. 



PHARBITIS ACUMINATA (Vahl.) Choisy de C. Prod. 9:348. 



Convolvulus acum. Vahl., Ipomxa acum. R. & S. One specimen 

 only, that from the base of Morro Hill, Santiago de Cuba (1079). 

 Sepals 2.5 cm. long, hispid-ciliate at the base and basal margin, 

 corolla 9.5 cm. long, branches pilose. 



PHARBITIS CATHARTICA (Poir.) Choisy. loc. cit. 342. 



Ipomoea cathartica Poir. The most prominent character running 

 through all of the following specimens is the deep madder-lake color 

 of the corolla limb, which is broad (about 6 cm. diam.) in all; the 

 calyx lobes are also constant. The variation in the leaf form is noted 

 for each locality. Moist grounds near Port Antonio, Jamaica (933), 

 leaves imperfectly 3-lobed n x 8 cm. outline cordate-acuminate. Dry 

 sandy soil south shores of Cayman Brae (1227), leaves regularly 

 3-lobed, 7 x 6. 5 cm. (1235), leaves complete or slightly 3-lobed 

 5.5-7 x 4.5-6 cm. attenuate-acuminate. Dry sandy soil near George- 

 town, Grand Cayman (1244), leaves cordate-orbicular complete or 

 showing unilaterally an attempt at trilobation, 5-6 x 5-6 cm; similar 

 situation (1246) leaves cordate-ovate acuminate, sinuately 3-lobed, 

 7.5 z 4.5 cm-; another (1403), leaves complete cordate-ovate mucro- 

 nate, and hederaceously and deeply 3-lobed, 6-7 x 5-6.5 cm.; another 

 from the center of Grand Cayman (1372) in woodlands, has the leaves 

 varying from cordate-orbicular to 2-3-lobed, 6x5 cm.; rocky shores of 

 Cape Corientes, Cuba (1452), leaves as in the last; woodlands of the 

 center of Cozumel (1793), leaves all entire cordate-acuminate 

 7-8.5 x 5.5-6.5 cm. 



PHARBITIS NIL (Linn.) Choisy. Mem. Soc. Phys. Genev. 6:441. 



Convolvulus Nil Linn, as to Dill. loc. cit. f. 92, Ph. hederacea 

 Choisy., Ipomcea hederacea Jacq., Ip. Nil Roth. Suburbs of Charlotte 

 Amalia, St. Thomas (418), the small slightly pilose-leaved form. 

 Calyx lobes 1.8 cm. Jong, limb 2.5 cm. in diameter. 



PHARBITIS PURPUREA (Linn.) Voigt. Hort. Suburb. Calc. 354. 



Convolviihis purp. Linn. Ipomcea purp. Linn. Ph. hispida Chois. 



